Description    Ingestion of excessive amounts of vitamin A causes proliferation of subperiosteal bone in cats and might also sensitize the periosteum to the effects of trauma. Some changes are reversible. Liver diets or supplements are common sources of vitamin A.
Species   Feline
Signs   Abdominal distention, Anorexia, Ataxia, Change in voice, Congestion oral mucous membranes, Decreased amount of stools, absent feces, constipation, Decreased mobility of forelimb joint, Decreased mobility of hindlimb joint, Decreased, absent mobility, back, Difficulty in prehending or chewing food, Dullness, Dysmetria, Forelimb hypoesthesia, Forelimb lameness, Forelimb pain, Forelimb swelling, Generalized lameness or stiffness, Head, face, neck, tongue hypoesthesia, Hindlimb lameness, Hindlimb swelling, Hyperesthesia, Inability to stand, Lack of growth or weight gain, Matted or dirty hair, Mouth, oral mucosal or tongue pain, Neck swelling, Pain, neck, cervical, throat, Paraparesis, Relative shortening forelimb, Relative shortening hind limb, Reluctant to move, Rough hair coat, Stiffness or extended neck, Tetraparesis, Underweight, poor condition, thin, emaciated, unthriftiness, ill thrift, Weight loss
References   Corbee RJ. Skeletal and hepatic changes induced by chronic vitamin A supplementation in cats. Vet J 2014;202:503 [Web Reference]
Trevail R. Differential diagnoses and treatment of cervical syndrome or neck pain. In Pract 2014;36:391 [Web Reference]
Guerra JM. Hypervitaminosis A-induced hepatic fibrosis in a cat. J Feline Med Surg 2014;16:243 [Web Reference]
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